Widely used for digital 3D coordinate measuring equipment, precision machinery, and special industrial machinery. Suitable for various electronic equipment, guide bars, drive shafts, and pillar bearing pillow blocks. Offers reliable load capacity, compatible with standard precision racks, and provides strong adaptability. Ensures smooth movement, low friction, high rigidity, and long service life. Features good abrasion resistance, corrosion resistance, high precision, and excellent strength. Color: Silver Material: Aluminum alloy Specifications: Steel Linear Shaft Optical Axis: - Outer diameter: 8mm (0.31 inch) - Length: 200mm (7.87 inch) Linear Rail Support Guide Shaft Bearing: - Product Size: 42 x 32 x 11mm (1.65 x 1.26 x 0.43 inch) - Inside Diameter: 8mm (0.31 inch) – compatible with 8mm optical axis Linear Ball Bearing: - Inner Diameter: 8mm (0.315 inch) - Length: 34.5mm (1.36 inch) Package Contents: - 4 x Linear Motion Ball Bearings - 4 x Rail Support Guides - 2 x Linear Shaft Optical Axes Note: The package includes only the items listed above. Other products are not included. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1–3 cm.